Zamir, Burhan, Zeeshan Naseer, and Babar Shahzad. “Electromagnetic Wave Propagation in a Rectangular Waveguide Filled With a Double-Negative (DNG) Metamaterial”. Research Prospects in Natural Sciences (RPNS) 2, no. 1 (June 26, 2024): 13–17. Accessed January 19, 2026. https://journals.gctownship.edu.pk/index.php/rpns/article/view/98.